Where are yall?

[Dr.MonaLisa]

It's very good idea. It be possible one, and only one topic, where I won't help to people, but people will be helping to me, lol

[NaviSly]

Mmmmh Maths
|x+1| + |x| = 3


We must change/transform |x+1| because he is "nasty"

|x+1| = x+1 (x+1) >= 0
|x+1| = -(x+1) (x+1) == 0[/u]

x >= -1
Now we should care of |x| : ( |x| = x if x >= 0 .... |x| = -x if x = -1 == 0

if x >= 0 :
x+1 >= 0
thus : |x+1| + |x| = 3
x+1 + x = 3
2 x = 2
x = 1
CCL : x = 1 "for" x >= 0

if -1 == 0 but x = x+1 -x = 3
1 = 3 (lol)
CCL : No solution for x € [ -1 ; 0 ] (€ o/)



x+1 = x = - (x+1) - x = 3
-x -1 -x = 3
-2x -1 = 3
-2x = 4
x = -2
CCL : x = -2 for x == suck...

[Dr.MonaLisa]

Oh my god... Now I probably understand it :/
Thank you Syl, that you explained everything that cool...

Unfortunately, I gave this "exam" already to the teacher, so I can't change it xD

I just wrote, something like:
X = -2
BECAUSE:
|-2+1|+|-2|=3

xDDDDD

[Matty]

Oh my god... Now I probably understand it :/
Thank you Syl, that you explained everything that cool...

Unfortunately, I gave this "exam" already to the teacher, so I can't change it xD

I just wrote, something like:
X = -2
BECAUSE:
|-2+1|+|-2|=3

xDDDDD

In the end it's what we said: -2 and +1 . xDDDDDD Obviously he wrote calculates too and it helps.

[Dr.MonaLisa]

The only one problem, is that I didn't write all calculations on the test... So it might look little weird, due that I gave correct answer, but without calculation xD

[Matty]

The only one problem, is that I didn't write all calculations on the test... So it might look little weird, due that I gave correct answer, but without calculation xD

in italy in every test we must write calculates or writing the reasoning.

[Dr.MonaLisa]

The only one problem, is that I didn't write all calculations on the test... So it might look little weird, due that I gave correct answer, but without calculation xD

in italy in every test we must write calculates or writing the reasoning.

Here too.
But I didn't LOL xD